Washington (CNNMoney) - President Obama will nominate his White House chief of staff, Jacob "Jack" Lew, to be the next U.S. Treasury Secretary on Thursday, a source with knowledge of the nomination tells CNN.

Lew, 57, has been the leading candidate for months and would be the second Treasury Secretary during the Obama administration.

(CNN) – Jack Lew, the White House chief of staff, said Sunday the Supreme Court decision upholding President Barack Obama's health care measure should put to rest the national debate over the law's practicality.

Speaking on CNN's "State of the Union," Lew said the Affordable Care Act, which was signed into law in 2010, needs to be fully implemented before Americans assess its merit, and that detractors of the law, including Obama's opponent in the 2012 presidential election, were using it to divide the country.FULL POST